Thanks - think I know the answer
Thanks to everyone for there messages, which have been interesting and useful. I am starting to think that I should not take the risk because my children are at an age (14 & 11) where it would be unfair to ask them to re-locate.
With many or most people willing to re-locate this may tip the scales towards giving up. Having said that, where I live is within 1 hour from Stanstead, Luton, Heathrow, Coventry and Birmingham.
In 5 years I could re-locate, although I would be 44.
Cheers